Oh, yes, they do.

You double check your office door is locked (no-one comes down here anyway), rub your hands together like the greasy horndog you are, and press play.

Charlie shakes her head as she turns back to the TV and resets herself on her yoga mat, muttering. "This is so ridiculous. The things I do for you, creep. You and that little - uh - well - anyway, that dick of yours. Be fuckin' grateful."

Despite her bratty aside, she soon starts doing her provocative yoga again - you're pretty sure that most normal yoga poses don't resemble sex acts, at least not quite this blatantly. Ed's gaze is like a laser, and his hand starts speeding up, all shame and guilt forgotten. Charlie takes a look behind her, clearly trying to play it cool. "Ugh, you look so stupid with that thing in your hand. You're so puny and lame, and it's so... big and... thick... um, and you, you look fucking stupid!" Blushing, she turns away again, and focuses on spreading her legs as wide as they will go. They look incredible in those skintight leggings.

Ed's really going to town on himself. His expression is goofy as hell, you half expect his tongue to start hanging out. He's definitely warmed up - his jacking off is getting noisier and noisier. Without pausing her routine or even looking at him Charlie says, "Listen to that, you're such a nasty bitch. Well I guess you're enjoying watching your hot step-sister stretch her tight body, just for you. I bet you're going to cum soon huh nerd? Just do it already." She suddenly looks over her shoulder, making intense eye contact but sounding strangely controlled: "I want you to cum for me."

Those dark, smoky, unblinking eyes. Those black, plump lips. That direct request. Even the emotionless way she said it. You're pretty close yourself.